Burnishing-tool.



J. GOULDBOURN.

BURNISHING TOOL.

APPLICA lON FILED APR. n. ISIS.

Patented Dec. 24, 1918.

/A/ Vf/WJR TED AE PATENT FJTTOE.

JOSEPH GOULDBOURN, 0F LEICESTER, ENGLAND, ASSIGNOR, BY MESN EASSIGNl/IENTS,

TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A COR-PORATION OF NEW JERSEY.

BURNISHING-TOOL.

Spetiifieation of Letters Patent.

Patented Dec. 241, 19118.

Application filed April 17, 1916'. Serial No. 91,649.

finishing of boots and shoes difiiculty has been experienced heretoforein properly burnishing that portion which lies at the junction of theheel breast and the shank. It is the object of my invention to provide aburnishing tool of simple and economical construction which shall becapable of pro ducing an improved quality of work and wherebydifficulties heretofore experienced may be obviated.

A feature of my invention is a novel burnishing tool having an annularbase member and a cover adapted to be drawn over and into said basemember whereby a smooth hard burnishing surface is produced.

This and other features of the invention, comprising certainarrangements and combinations of parts, will be described in thefollowing specification and pointed out in the claims.

In the drawing which shows a preferred embodiment of the invention. afrusto-conical member 1 is formed of wood or other rigid material and abase portion 2 of india rubber or like resilient ma erial is mountedupon it. The element 2 has two working surfaces 3 and 4 both inclined tothe axis of rotation of the tool for a purpose which will be described.The members i and Q are hollow in order to receive a clamping member asshown.

This clamping member comprises a portion 5 having a threaded shank 6 andtapped at 7 for the screw 8. It has an annular depression 9 in its outerend and carries a cap 10 having a lip 11 adapted to enter the annulardepression 9. The screw 8 draws the cap 10 firmly into clamping positionupon the member 5. The shank 6 projects through the open end of themember 1 and screws into a tapped hole in the end of a member 12 whichis tapped for a set screw 13 and is adapted to be mounted in anyconvenient way upon the rotating shaft 14- which is power driven in anydesired way. A washer 15 is mounted upon the shank 6 between the members1 and 12.

Knitted or woven fabrics as covers for burnishing tools are liable tosuffer considerably from abrasion and wear and I have found that leatheror similar material. particularly when in the form of a continuous sheetand preferably merely tightly strained over the supporting members 1 and2, forms a very effective burnishing cover. The cover 16 is formed of asheet having a central orifice through which the shank 6 passes and ispreferably subjected to some preliminary molding operation which roughlyforms .it to the shape which it will take up when on the tool. Themargin of the sheetis preferably slit to facilitate plaiting into theclamp and is turned over the base of the conical-member 2 and insertedbetween the cap 10 and the clamping member The screw8 is then tightenedto clamp the cover 16 firmly between these two members while the otherend of the cover rests between the washer 15 and the member 1. Therelative rotation of the member 12 and the screw 6 will draw the clamp 5into the cone. stretching the cover 16 over the members 1 and 2 and atthe same time expanding the member 2, whereby a smooth, hard and yetresilient burnishing surface is obtained at 3 and l. The screw 13 is setup against the shank 6 when the cover has been properly adjusted inorder to retain it properly in position.

The corner formed by the heel breast and the shank of the shoe will beapplied to the edge of the tool as shown and the sharp resilient cornerof the tool will fit into the sharp corner on the shoe and hurnish it.It, will be noticed that the surfaces 3 and -l' a re set at such anangle with the axis of rotation of the tool that the burnishing of thecorner between the heel breast and the shank is not interfered with bycontact between the fore part of the shoe authtlle tool.

It is a particular advantage of the arrangement described that the edgeof the tool between the surfaces 8 and l retains its sharpness to a verymarked extent in use and does not lose its form and therefore its powerof entering into and satisfactorily burnishing the angle in questionuntil the cover is practically Worn through.

Having described my invention, what I claim as new and desire to secureby United States Letters Patent is 1. In a burnishing tool, an annularbase member, a burnishing cover for said member, means for positivelyholding one part of said cover and for positively drawing an edge ofsaid cover into the base member whereby said cover is positivelystretched over said base member.

2. In a burnishing tool, a base member formed of solid but resilientmaterial, and a tubular cover for said member and means for positivelystretching said cover parallel and transverse to the axis of the tubularmember over said base member.

3. In a burnishing tool, abase member composed of resilient material,and a cover for said base member and means for stretching said coverover said base member in one direction and for expanding said basemember within said cover in a direction substantially perpendicular tothe first mentioned direction. I l. Alburnishing tool comprising an annular resilient base, and an annular cover and means for gripping oneedge of said,

cover and for gripping and tensioning the other edge of said coverwhereby said cover is stretched over said base.

5. A burnis hing tool comprising a substantially conical base member, acover, means for clamping said cover at the apex of said base member andfor drawing said cover radially over the base of the conical membertoward the center of said conical member. v

6. A burnishing'tool comprising an annular substantially conical base, aclamping member having av shank mounted in said base, a cover for saidbase arranged to be gripped by said clamp and to extend to the apex ofthe cone, and means for drawing said clamping member into said basemember and for clamping said cover to said apex.

7. A burnishing tool comprising a sharp edged. resilient ring, and meansfor holding one edge of a cover and for drawing said cover over saidring and expanding said ring Within said cover to stretch the cover,whereby a sharp edged, firm, resilient burnishing surface is produced.

8. In a burnishing tool, an annular base member formed of resilientmaterial, a cover for said member, and means for stretching the coveraround the base member in planes parallel and perpendicular to the axisof the annular base member.

name to this specification.

JOSEPH GOULDBOURN.

